Gas Safety Certificate London — Included Free

Gas safety certificate in London — what it is and why it matters

A gas safety certificate — officially called a Gas Safety Record and widely known as a CP12 certificate — is an official document issued by a Gas Safe registered engineer after inspecting or installing gas appliances, pipework, flues and ventilation in a property. It confirms that all gas work has been completed safely, legally and in full compliance with UK gas safety regulations.

At Gas Hob Installation London, every gas cooker and hob installation we carry out across London includes an official Gas Safe installation certificate issued free on the same day. You do not pay extra for it. You do not wait for it. It is issued as soon as the engineer has completed all required safety checks and confirmed the installation is safe and compliant.

What is a CP12 certificate and who needs one?

The term CP12 comes from CORGI Proforma 12 — the original form used for landlord gas safety records under the CORGI registration scheme, which was replaced by the Gas Safe Register in 2009. Although the term CP12 is no longer the official name, it is still widely used across the property industry to refer to the annual landlord gas safety record.

Under the Gas Safety (Installation and Use) Regulations 1998, all landlords who let residential properties with gas appliances in England, Scotland and Wales are legally required to:

• Have all gas appliances, flues and associated pipework checked by a Gas Safe registered engineer at least once every 12 months
• Keep a record of each gas safety check for at least two years
• Provide a copy of the gas safety record to existing tenants within 28 days of the check being completed
• Provide a copy to new tenants before they move in

Our Gas Safe installation certificate issued with every cooker and hob installation is the legal proof that the appliance was installed safely by a registered engineer — a key part of a landlord's overall gas safety compliance documentation.

What is included in a gas safety certificate?

A gas safety installation certificate issued by our engineers in London includes the following information and confirms the following checks have been carried out:

• Engineer's Gas Safe registration number — confirms the engineer is legally authorised to carry out gas work
• Property address — where the installation was carried out
• Date of installation — confirms when the work was done
• Appliance details — make, model and type of gas appliance installed
• Gas tightness test result — confirms no leaks at any connection point, verified using manometer equipment
• Standing pressure and working pressure — gas supply pressure at the appliance inlet confirmed within manufacturer's specification
• Combustion analysis results — confirms correct combustion on all burners
• Ventilation check result — confirms adequate ventilation per Building Regulations Part J
• Flame failure device (FFD) test result — confirms the automatic safety cut-off works on every burner
• Safety status — whether the appliance has been left safe to use (ID1 — immediately dangerous, ID2 — at risk, or safe)

The legal requirement for gas safety certificates in the UK

The Gas Safety (Installation and Use) Regulations 1998 make it a legal requirement for all gas appliance installation and maintenance work in the UK to be carried out by a Gas Safe registered engineer. This applies to every gas appliance — gas hobs, gas cookers, gas ovens, gas fires, boilers and any other domestic gas appliance.

Only a Gas Safe registered engineer can legally issue a gas safety certificate. A certificate issued by an unregistered person is not legally valid and will not be recognised by:

• Home insurance providers
• Mortgage lenders and conveyancers
• The Health and Safety Executive (HSE)
• Local authority housing enforcement teams
• Letting agents and property management companies

When our engineer arrives at your London property, they carry a valid Gas Safe ID card showing their registration number and the types of gas work they are qualified to carry out. You can verify this at gassaferegister.co.uk before they begin work.

Gas safety certificate for gas cooker and hob installation in London — what our certificate confirms

Every gas safety installation certificate we issue in London after a gas cooker or hob installation confirms that the following work was carried out by a Gas Safe registered engineer:

• The bayonet fitting was inspected for condition and BS 669 compliance
• A new BS 669 compliant corrugated stainless steel flexible connector was fitted
• A full gas tightness test was carried out using manometer equipment — zero pressure loss confirmed
• Supply pressure test at appliance inlet completed and result recorded
• A combustion check was carried out on all burners — blue flame confirmed, carbon monoxide risk minimised
• Ventilation requirements were assessed per Building Regulations Part J
• Flame failure devices (FFD) were tested on every burner and confirmed operational
• A stability chain was fitted on all freestanding cookers
• The appliance was left in a safe condition for use

Gas safety certificate for landlords in London — how our installation certificate helps your CP12 compliance

London has one of the largest private rental sectors in the UK. Landlords in London — whether managing a single flat in Hackney or a portfolio of properties across multiple boroughs — must maintain rigorous gas safety compliance across all their properties. Our gas safety installation certificate plays an important role in this compliance picture:

• It provides documented proof that your gas cooker or hob was installed by a Gas Safe registered engineer — a legal requirement
• It confirms the installation date, from which your 12-month annual gas safety check cycle begins
• It can be presented to your annual gas safety inspector as evidence of compliant installation
• It protects you from liability in the event of a gas-related incident at the property
• It satisfies letting agent and property management requirements for documented gas safety compliance

We work with individual landlords, letting agents and property management companies across all London boroughs. If you are a landlord who needs a gas cooker or hob installed in a London rental property, WhatsApp us your postcode and we confirm availability — often same day for urgent pre-tenancy installations.

Gas safety certificate — important updates for London landlords in 2025 and 2026

There have been important regulatory updates to gas safety certification requirements in recent years that London landlords should be aware of:

• April 2025 — Digital certificate mandate: Gas safety records are increasingly being issued and stored digitally. Many Gas Safe engineers now issue certificates by email within 24 hours. Our engineers issue the certificate on the same day as the installation
• 2026 onwards: Enhanced carbon monoxide monitoring requirements and new appliance inspection protocols are expected to come into force. These will affect annual gas safety checks but not the installation certification process
• Annual checks remain mandatory: Gas safety records must still be renewed every 12 months for all rental properties with gas appliances, regardless of when the appliances were last installed or certified